Here's the question you clicked on:

55 members online
  • 0 replying
  • 0 viewing


  • 3 years ago

Hey,i want to make a circuit for alarm that rings out(for a duration) when AC 220v mains is comes to ON after a failure/pause.Suggest some...

  • This Question is Closed
  1. JonTitus
    • 3 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    Connect a small plug-in power supply to your 220-volt line. Use DC output of power supply to drive a 555 timer circuit that can turn on an alarm for a preset period.

  2. Not the answer you are looking for?
    Search for more explanations.

    • Attachments:

Ask your own question

Sign Up
Find more explanations on OpenStudy
Privacy Policy